The hosts and co-organisers of the event are the Islamic Community in Bosnia and Herzegovina, the Serb Orthodox Church, the Sarajevo Archdiocese, and the Jewish Community in Bosnia.
Thousands of participants are expected to attend as well as representatives of religious communities, international politics and culture.
Josipovic will be one of the speakers.
Ahead of the meeting, he will hold talks with Bosnian Presidency Chairman Bakir Izetbegovic, followed by a working lunch with the Presidency members. He will also hold separate meetings with European Council President Herman Van Rompuy, Italian Prime Minister Mario Monti, and the Archbishop of Sarajevo, Cardinal Vinko Puljic.